Power converter

Abstract

A power converter includes a PCB having opposing first and second sides, and a plurality of first commutation units and first capacitor unit disposed on the PCB. Each first commutation unit includes a first discrete component and a second discrete component. The second end of the first discrete component is electrically coupled to the first end of the second discrete component, and the first capacitor unit is electrically coupled to the first ends of the first discrete components and the second ends of the second discrete components in the plurality of first commutation units, respectively. The first discrete components and the second discrete components in the plurality of first commutation units are arranged in a row. The first discrete component and the second discrete component in each first commutation unit form a commutation loop together with the first capacitor unit.

What is claimed is: 
     
         1 . A power converter, comprising:
 a PCB having a first side and a second side opposite to one another;   a plurality of first commutation units disposed on the PCB, each of the first commutation units comprising a first discrete component and a second discrete component, a second end of the first discrete component being electrically coupled to a first end of the second discrete component; and   a first capacitor unit disposed on the PCB, and the first capacitor unit being electrically coupled to a first end of the first discrete component and a second end of the second discrete component in each of the plurality of first commutation units, respectively,   wherein the first discrete components and the second discrete components in the plurality of first commutation units are arranged in a row, the first discrete component and the second discrete component in each of the first commutation units forms a commutation loop together with the first capacitor unit.   
     
     
         2 . The power converter of  claim 1 , wherein the first discrete components in the plurality of first commutation units are electrically coupled in parallel, and the second discrete components in the plurality of first commutation units are electrically coupled in parallel. 
     
     
         3 . The power converter of  claim 1 , wherein the first discrete components and the second discrete components in the plurality of first commutation units are alternately arranged in a row. 
     
     
         4 . The power converter of  claim 1 , wherein the first discrete components and the second discrete components in the plurality of first commutation units are located on the first side of the PCB. 
     
     
         5 . The power converter of  claim 1 , further comprising a plurality of second commutation units disposed on the PCB, the plurality of second commutation units and the plurality of first commutation units being symmetrically disposed, each of the second commutation units comprising a third discrete component and a fourth discrete component; a second end of the third discrete component being electrically coupled to a first end of the fourth discrete component; a first end of the third discrete component in each of the plurality of second commutation units being electrically coupled to the first end of the first discrete component in each of the plurality of first commutation units, and a second end of the fourth discrete component in each of the plurality of second commutation units being electrically coupled to the second end of the second discrete component in each of the plurality of first commutation units, wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row, and the third discrete component and the fourth discrete component in each of the second commutation units form a commutation loop together with the first capacitor unit. 
     
     
         6 . The power converter of  claim 1 , further comprising:
 a plurality of second commutation units and second capacitor unit disposed on the PCB; the plurality of second commutation units and the plurality of first commutation units being symmetrically disposed, each of the second commutation units comprising a third discrete component and a fourth discrete component; a second end of the third discrete component being electrically coupled to a first end of the fourth discrete component; the second capacitor unit being electrically coupled to a first end of the third discrete component and a second end of the fourth discrete component in each of the plurality of second commutation units, respectively; the first capacitor unit and the second capacitor unit being coupled in series, and the second end of the second discrete component in each of the plurality of first commutation units being electrically coupled to the first end of the third discrete component in each of the plurality of second commutation units; wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row, and the third discrete component and the fourth discrete component in each of the second commutation units form a commutation loop together with the second capacitor unit.   
     
     
         7 . The power converter of  claim 1 , further comprising:
 a plurality of second commutation units and a second capacitor unit disposed on the PCB; each of the second commutation units comprising a third discrete component and a fourth discrete component; a first end of the third discrete component in each of the plurality of second commutation units being electrically coupled to a first end of the second capacitor unit, a second end of the third discrete component in each of the plurality of second commutation units being electrically coupled to a first end of the first capacitor unit, a second end of the fourth discrete component in each of the plurality of second commutation units being electrically coupled to a second end of the second capacitor unit, and a first end of the fourth discrete component in each of the plurality of second commutation units being electrically coupled to a second end of the first capacitor unit; wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row, and the third discrete component and the fourth discrete component in each of the second commutation units form a commutation loop together with the second capacitor unit and the first capacitor unit.   
     
     
         8 . The power converter of  claim 5 , wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are alternately arranged in a row. 
     
     
         9 . The power converter of  claim 5 , wherein the plurality of first commutation units are located on the first side of the PCB, the plurality of second commutation units are located on the second side of the PCB, and the first capacitor unit is located between the first commutation units and the second commutation units, wherein the first capacitor unit comprises a plurality of first capacitors and the plurality of first capacitors are arranged in two rows disposed side by side. 
     
     
         10 . The power converter of  claim 5 , wherein the first discrete components and the second discrete components in the plurality of first commutation units, and the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row and located on the first side of the PCB, and wherein the first capacitor unit comprises a plurality of first capacitors, and the plurality of first capacitors are arranged in a row. 
     
     
         11 . The power converter of  claim 6 , wherein the third discrete components in the plurality of second commutation units are electrically coupled in parallel, the fourth discrete components in the plurality of second commutation units are electrically coupled in parallel, and the second capacitor unit comprises a plurality of second capacitors and the plurality of second capacitors are electrically coupled in parallel. 
     
     
         12 . The power converter of  claim 6 , wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are alternately arranged in a row. 
     
     
         13 . The power converter of  claim 6 , wherein the plurality of first commutation units are located on the first side of the PCB, the plurality of second commutation units are located on the second side of the PCB, and the first capacitor unit and the second capacitor unit are both located between the plurality of first commutation units and the plurality of second commutation units. 
     
     
         14 . The power converter of  claim 13 , wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors are arranged in a row, the plurality of second capacitors are arranged in a row, and the plurality of first capacitors and the plurality of second capacitors are disposed side by side; wherein the plurality of first capacitors are close to the first commutation units, and the plurality of second capacitors are close to the second commutation units; or
 wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; a first part of the plurality of first capacitors are arranged in a row, a second part of the plurality of first capacitors and the plurality of second capacitors are alternately arranged in a row and are disposed side by side with the first part of the plurality of first capacitors; wherein the first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and the second part of the plurality of first capacitors and the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the second commutation units.   
     
     
         15 . The power converter of  claim 6 , wherein the first capacitor unit and the second capacitor unit are arranged in a row, and the first discrete components and the second discrete components in the first commutation units and the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row and located on the first side of the PCB. 
     
     
         16 . The power converter of  claim 15 , wherein
 the first capacitor unit comprises a plurality of first capacitors, the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors and the plurality of second capacitors are arranged in a row, wherein the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the plurality of second commutation units; or   the first capacitor unit comprises a plurality of first capacitors, the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors and the plurality of second capacitors are arranged in a row, wherein a first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and a second part of the plurality of first capacitors and the plurality of second capacitors are alternately arranged in a row and close to the third discrete components and the fourth discrete components in the plurality of second commutation units.   
     
     
         17 . The power converter of  claim 7 , wherein the third discrete components in the plurality of second commutation units are electrically coupled in parallel, the fourth discrete components in the plurality of second commutation units are electrically coupled in parallel, and the second capacitor unit comprises a plurality of second capacitors and the plurality of second capacitors are electrically coupled in parallel. 
     
     
         18 . The power converter of  claim 7 , wherein the third discrete components and the fourth discrete components in the plurality of second commutation units are alternately arranged in a row. 
     
     
         19 . The power converter of  claim 7 , wherein the plurality of first commutation units are located on the first side of the PCB, the plurality of second commutation units are located on the second side of the PCB, and the first capacitor unit and the second capacitor unit are both located between the plurality of first commutation units and the plurality of second commutation units. 
     
     
         20 . The power converter of  claim 19 , wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors are arranged in a row, the plurality of second capacitors are arranged in a row, and the plurality of first capacitors and the plurality of second capacitors are disposed side by side; wherein the plurality of first capacitors are close to the first commutation units, and the plurality of second capacitors are close to the second commutation units; or
 wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; a first part of the plurality of first capacitors are arranged in a row, a second part of the plurality of first capacitors and the plurality of second capacitors are alternately arranged in a row and are disposed side by side with the first part of the plurality of first capacitors; wherein the first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and the second part of the plurality of first capacitors and the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the second commutation units.   
     
     
         21 . The power converter of  claim 7 , wherein the first capacitor unit and the second capacitor unit are arranged in a row, and the first discrete components and the second discrete components in the first commutation units and the third discrete components and the fourth discrete components in the plurality of second commutation units are arranged in a row and located on the first side of the PCB. 
     
     
         22 . The power converter of  claim 21 , wherein
 the first capacitor unit comprises a plurality of first capacitors, the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors and the plurality of second capacitors are arranged in a row, wherein the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the plurality of second commutation units; or   the first capacitor unit comprises a plurality of first capacitors, the second capacitor unit comprises a plurality of second capacitors; the plurality of first capacitors and the plurality of second capacitors are arranged in a row, wherein a first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the first commutation units, and a second part of the plurality of first capacitors and the plurality of second capacitors are alternately arranged in a row and close to the third discrete components and the fourth discrete components in the plurality of second commutation units.   
     
     
         23 . The power converter of  claim 7 , further comprising a plurality of third commutation units, a plurality of fourth commutation units and a third capacitor unit disposed on the PCB; the plurality of third commutation units and the plurality of fourth commutation units being symmetrically disposed with the plurality of first commutation units and the plurality of second commutation units;
 each of the third commutation units comprising a fifth discrete component and a sixth discrete component, a second end of the fifth discrete component being electrically coupled to a first end of the sixth discrete component, the third capacitor unit being electrically coupled to a first end of the fifth discrete component and a second end of the sixth discrete component in each of the plurality of third commutation units, respectively; wherein the fifth discrete components and the sixth discrete components in the plurality of third commutation units are arranged in a row, and the fifth discrete component and the sixth discrete component in each of the third commutation units form a commutation loop together with the third capacitor unit;   each of the fourth commutation units comprises a seventh discrete component and an eighth discrete component, the third capacitor unit is electrically coupled to a second end of the seventh discrete component and a first end of the eighth discrete component in each of the plurality of fourth commutation units, respectively, and the second capacitor unit is electrically coupled to a first end of the seventh discrete component and a second end of the eighth discrete component in each of the plurality of fourth commutation units, respectively; wherein the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units are arranged in a row, and the seventh discrete component and the eighth discrete component in each of the fourth commutation units form a commutation loop together with the second capacitor unit and the third capacitor unit.   
     
     
         24 . The power converter of  claim 23 , wherein the fifth discrete components in the plurality of third commutation units are electrically coupled in parallel, the sixth discrete components in the plurality of third commutation units are electrically coupled in parallel, the seventh discrete components in the plurality of fourth commutation units are electrically coupled in parallel and the eighth discrete components in the plurality of fourth commutation units are electrically coupled in parallel. 
     
     
         25 . The power converter of  claim 23 , wherein the fifth discrete components and the sixth discrete components in the plurality of third commutation units are alternately arranged in a row; and the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units are alternately arranged in a row. 
     
     
         26 . The power converter of  claim 23 , wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; and the third capacitor unit comprises a plurality of third capacitors, wherein the first discrete components and the second discrete components in the plurality of first commutation units, and the third discrete components and the fourth discrete components in the plurality of second commutation units are located on the first side of the PCB; the fifth discrete components and the sixth discrete components in the plurality of third commutation units, and the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units are located on the second side of the PCB; a first part and a second part of the plurality of first capacitors and a first part of the plurality of second capacitors are arranged in a row; the second part of the plurality of first capacitors and the first part of the plurality of second capacitors are alternately disposed; and the first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the plurality of first commutation units, the second part of the plurality of first capacitors and the first part of the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the plurality of second commutation unit; a first part and a second part of the plurality of third capacitors and a second part of the plurality of second capacitors are arranged in a row; the second part of the plurality of third capacitors and the second part of the plurality of second capacitors are alternately disposed; the first part of the plurality of third capacitors are close to the fifth discrete components and the sixth discrete components in the plurality of third commutation units; and the second part of the plurality of third capacitors and the second part of the plurality of second capacitors are close to the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units. 
     
     
         27 . The power converter of  claim 23 , wherein the first capacitor unit comprises a plurality of first capacitors; the second capacitor unit comprises a plurality of second capacitors; and the third capacitor unit comprises a plurality of third capacitors; wherein the plurality of first commutation units and the plurality of third commutation units are located on the first side of the PCB, the plurality of second commutation units and the plurality of fourth commutation units are located on the second side of the PCB; a first part of the plurality of first capacitors and a first part of the plurality of third capacitors are arranged in a row; the first part of the plurality of first capacitors are close to the first discrete components and the second discrete components in the plurality of first commutation units; and the first part of the plurality of third capacitors are close to the fifth discrete components and the sixth discrete components in the plurality of third commutation units; a second part of the plurality of first capacitors and a first part of the plurality of second capacitors are alternately arranged in a row; a second part of the plurality of third capacitors and the second part of the plurality of second capacitors are alternately arranged in a row; and the second part of the plurality of first capacitors, the first part of the plurality of second capacitors, the second part of the plurality of third capacitors, and the second part of the plurality of second capacitors are disposed side by side with the first part of the plurality of first capacitors and the first part of the plurality of third capacitors; the second part of the plurality of first capacitors and the first part of the plurality of second capacitors are close to the third discrete components and the fourth discrete components in the plurality of second commutation units; and the second part of the plurality of third capacitors and the second part of the plurality of second capacitors are close to the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units. 
     
     
         28 . The power converter of  claim 26 , further comprising an enclosed cavity, the enclosed cavity comprising a middle chamber, a first side chamber, and a second side chamber; the first side chamber and the second side chamber being located on both sides of the middle chamber, and being connected to the middle chamber; wherein the plurality of first capacitors, the plurality of second capacitors and the plurality of third capacitors are accommodated in the middle chamber; the first discrete components and the second discrete components in the plurality of first commutation units, and the third discrete components and the fourth discrete components in the plurality of second commutation units are accommodated in the first side chamber; the fifth discrete components and the sixth discrete components in the plurality of third commutation units and the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units are accommodated in the second side chamber; the first side chamber is provided with a first heat sink, and the second side chamber is provided with a second heat sink. 
     
     
         29 . The power converter of  claim 27 , further comprising an enclosed cavity, the enclosed cavity comprising a middle chamber, a first side chamber, and a second side chamber; the first side chamber and the second side chamber being located on both sides of the middle chamber, and connected to the middle chamber; wherein the plurality of first capacitors, the plurality of second capacitors and the plurality of third capacitors are accommodated in the middle chamber; the first discrete components and the second discrete components in the plurality of first commutation units, and the fifth discrete components and the sixth discrete components in the plurality of third commutation units are accommodated in the first side chamber; the third discrete components and the fourth discrete components in the plurality of second commutation units, and the seventh discrete components and the eighth discrete components in the plurality of fourth commutation units are accommodated in the second side chamber; the first side chamber is provided with a first heat sink, and the second side chamber is provided with a second heat sink. 
     
     
         30 . The power converter of  claim 1 , further comprising an enclosed cavity, the enclosed cavity comprising a middle chamber and a first side chamber connected to the middle chamber; the first capacitor unit being accommodated in the middle chamber, the first discrete components and the second discrete components being accommodated in the first side chamber, and the first side chamber being provided with a first heat sink.